SwapStruct
This command is similar to the Civil 3D SwapNetworkPart command.
The difference is that it allows to replace multiple structures at once.
It also displays information relevant to the selected partsize.
See the image below.
When activating the command, it prompts the selection of multiple structures, then it will show this screen:
Select the desired structure.
Ready, all selected structures will be replaced.
Note: that styles and rules defined in the new structures,
partsize are set forth in the parts list not the former structure, as in the native command
Civil 3D: SwapNetworkPart.
Tip: if you walked changing styles of the structures,
you can override the styles of them by that which is defined in parts list,
to use this command
CReset.